Engines With Volvo® Stern Drive Prearrangement - FNM HPE Series Installation Manual

4.5.1 Direct connection
The direct connection is made by connecting the flange of the
water-jet propulsion unit directly on the flywheel with the
lineshaft, as in the following image:
flexible coupling
water-jet
stiff lineshaft
lightened handwheel
Figure 18 - Direct connection between engine and water-jet
propulsion unit
This configuration is known as "lightweight ".
The direct connection must be performed only in cases in
which the flywheel of the engine is set for this application. It is
mandatory to use a flexible coupling to each of the two ends of
the shaft.
Engine connection to the water-jet propulsion unit
without two flexible couplings can cause breakage of
the engine and water-jet propulsion unit lineshaft.
It is necessary to recheck the engine alignment:
at least 24 hours after installation, with the boat
-
in the water, during the sea trial.
after 30h during the first service.
-
The engine must be perfectly aligned with the flange of
the water-jet propulsion unit. To align the engine, follow the
principles described in paragraph 4.3 – Engines with inverter
on page 18.
4.5.2 Connection to the flange with bearings
The connection to the flange with bearings involves the use of
a constant velocity transmission, as in the following image:
constant velocity joint
water-jet
Figure 19 - Connection between engine and water-jet propulsion unit
with flange with bearing
The flange with bearings is an integral part of the engine. The
coupling is made by means of a constant velocity
20 – FNM® Series HPE – Installation Manual
engine
angle
engine
angle
transmission, which must be suitably dimensioned according
to the engine power.
For the coupling installation refer to the installation manual of
the coupling manufacturer. Some constant velocity joints
are designed to work only at an angle and never in
straight alignment. In this case the positioning and alignment
of the engine can be carried out by checking only the engine
and water-jet propulsion unit angles of installation.
The selection and sizing of the model of constant velocity
joint is the responsibility of the engine in the boat.
In the case of use of joints that require precise alignment,
follow the principles described in paragraph 4.3 – Engines with
inverter on page 18.
4.5.3 Installation angle of the water-jet engines
The installation angle of the engine must not exceed those
maximum permitted in the installation drawings of the engine,
and in any case depends on the type of water-jet propulsion
unit, the shape of the hull and desired performance.
The engine angle installation is not permitted as it
involves the malfunction of the engine and can lead
to its breakage.
Refer to the installation manual of the manufacturer of the
water-jet propulsion unit for more information on the proper
selection of the angle and the position of the water-jet
propulsion unit with respect to the keel line.
4.5.4 Other connection methods
Other connection methods between engine and water-jet
propulsion unit (e.g. with inverter interposed) do not fall in the
solutions provided by CMD and are not covered by this
manual.
The responsibility for the choice and selection of
different components in the connection between
engine and water-jet engine is the exclusive
responsibility of the engine installer in the boat.
4.6 Engines with Volvo® stern drive
prearrangement
Compatibility with the Volvo® stern drive transmission is given
only in case of new engines. CMD is not in any way connected
to the Volvo brand or its products.
The installation of HPE engines on Volvo® stern
drives is the exclusive responsibility of the engine
installer in the boat.